14 results about "BACnet" patented technology

The invention discloses an application logic configuration method and system of a heating ventilation air conditioning system, a storage medium and a program product. The application logic configuration method of the heating, ventilation and air conditioning system comprises the steps that information of building automation control network BACnet equipment which is divided into at least one area group in advance based on at least one service area in the heating, ventilation and air conditioning system is obtained; by taking each region group in the at least one region group as a unit and aiming at the current region group, inputting information of each BACnet device of the region group into a trained application logic configuration model, obtaining an application logic configuration result which is output by the application logic configuration model and comprises the incidence relation and the logic control between the BACnet devices; and obtaining an application logic configuration result for BACnet server control and management based on the application logic configuration result of the at least one area group. According to the technical scheme, the configuration efficiency can be improved.

Methods provide device authentication for an intrusion detection system implementing building automation and control network (BACnet) Master-Slave / Token-Passing (MS / TP). An authentication protocol provides countermeasures to vulnerabilities in the BACnet MS / TP physical layer by utilizing an extended message format to cloak device identifiers (IDs). Adversaries are prevented from using known device IDs to gain access to the network. An authenticating device hashes a device identifier of a device to be authenticated combined with a random number. The authenticating device receives a hash of the random number plus the device identifier from the device. The authenticating device compares the hashes and authenticates the device if the hashes match. To transmit the hash, the BACnet MS / TP frame format includes an extended header cyclic redundancy check (CRC) field having bytes reallocated from the data field of the frame format. Another countermeasure utilizes a physical unclonable function (PUF) of the device in the extended header CRC.

A modular, plug-and-play Building Management System (BMS) control box for streamlining the integration and control of multiple standalone HVAC systems in large commercial and industrial facilities. The control box comprises a pre-wired enclosure with a generic BACnet MSTP thermostat and a wireless device securely mounted inside, exposing only specific plugs for technicians to connect, ensuring each input and output can only be matched to its corresponding plug, thereby preventing incorrect installations. The invention reduces installation costs, enhances reliability, and offers flexibility and scalability by simplifying the integration process, minimizing wiring requirements, and enabling easy expansion to accommodate additional HVAC units as needed. The modular design allows for customization to suit specific facility requirements and environments.

Systems and methods for optimizing HVAC systems in large institutions are provided. Various embodiments of the technology provide systems and methods for determining and predicting building occupancy more accurately and in real-time to enhance energy usage and occupant comfort. Embodiments include a system and method that uses existing Wi-Fi infrastructure to collect wireless presence data, processes this data in a cloud-based environment, and employs machine learning algorithms to forecast occupancy. The system integrates scheduling data and can also incorporate CO2 sensor data to refine these predictions and dynamically adjust HVAC set points via the BACnet protocol.

This application provides an attack detection method, apparatus, electronic device, and computer-readable storage medium, relating to the field of computer technology. The attack detection method includes: when the number of request packets received from the same client within a preset time period meets a preset condition, sending a retransmission instruction to the client, the retransmission instruction instructing the client to send a retransmission packet identical to the client's most recently sent request packet; after sending the retransmission instruction, when receiving the first request packet from a client with the same IP address as the client, comparing the first request packet with the most recently sent request packet to detect whether the client is engaging in attack behavior. A client launching a reflection amplification attack will forge the BACnet request source IP; it will not receive the retransmission instruction and therefore will not send a retransmission packet. Therefore, by comparing the first request packet with the most recently sent request packet, the presence of attack behavior by the client can be detected.

The application discloses an Internet of Things device access authentication method and system based on edge computing. The method comprises the following steps: a device sends an access request, and an edge node analyzes a protocol to generate a feature fingerprint; a cloud end performs a first protocol whitelist verification, a second certificate and feature fingerprint verification, matches an authentication strategy according to an environmental parameter, and issues a token; the edge node performs a localized authentication, monitors a state in real time, and dynamically adjusts the strategy; and after the authentication is passed, information is synchronized to the cloud end to complete registration. The system comprises a device access layer, an edge computing layer, an authentication management layer and an interaction interface layer, the edge layer analyzes DALI, BACnet and other protocols, the management layer constructs a three-dimensional strategy mapping table, supports graphical configuration and machine learning optimization of a strategy library. The application discloses an Internet of Things device access authentication method and system based on edge computing, which realizes low-delay, high-flexible access of multi-protocol devices, improves real-time performance, expansibility and security, and is suitable for intelligent building, industrial Internet of Things and other scenes.

Device for influencing at least one operating parameter of an existing control and / or regulating device (11) of a technical system, in particular a refrigeration, air conditioning or HVAC system, characterized by (i) Means (2, 3) for determining an external control variable (in particular electricity price / cost time series, CO2 intensity, grid signal or flexibility signal) and for determining a price / cost index derived therefrom and / or a control variable (setpoint offset and / or demand limit); (ii) a communication interface (4) for writing at least one operating parameter, in particular a setpoint, operating mode and / or a power / demand limit, to an existing control / regulation device (11) via a fieldbus or data network-based connection, including but not limited to BACnet, Modbus, KNX, OPC UA, MQTT, HTTP / REST, WebSocket, Ethernet / IP, M-Bus or CAN; (iii) a failsafe mechanism (9) which automatically resets to a predefined safe operating state in the absence of valid control variables and / or in the event of communication / software errors, in particular by reverting set values, holding a last valid value for a maximum hold time and / or setting conservative default parameters.

The invention relates to the technical field of Internet of Things communication, and discloses an acquired data processing method and system for large-scale BACnet equipment, and the method comprises the steps: 1, carrying out the quick discovery and recognition of the BACnet equipment based on a WhoIs request mechanism; step 2, establishing a BACnet protocol stack based on the BACpyes library, and communicating with the BACnet equipment through the BACnet protocol stack; evaluating the BACnet equipment according to the equipment type, the equipment importance and the response performance parameters, and obtaining an initial priority score of the BACnet equipment; 3, adopting a multi-thread concurrent architecture to communicate with the BACnet equipment, monitoring the network state in real time, and performing intelligent scheduling according to the monitored network state and the initial priority score of the BACnet equipment; and 4, monitoring the performance index of the equipment in real time, and performing periodic health diagnosis on the equipment according to the performance index.

The invention provides a COV proxy method based on a BACnet router and the router. A proxy subscription table is established in the router, and the proxy subscription table is used for recording the corresponding relation among the subscription end, the subscribed equipment, the subscribed object and the attributes of the subscribed object. The method comprises the following steps: receiving a COV subscription request sent by a subscription end; judging whether the target subscribed equipment, the target subscribed object and the attributes thereof are subscribed by other subscribing ends or not according to the COV subscription request and the proxy subscription table; if yes, writing the subscription end into a subscription end list corresponding to the target subscribed equipment, the target subscribed object and the attributes thereof in a proxy subscription table; if not, under the condition that the target subscribed equipment has the COV subscription function, initiating COV subscription for the target subscribed object and the attribute of the target subscribed object to the target subscribed equipment, and writing a corresponding relation between the subscription end and the target subscribed equipment and a corresponding relation between the subscription end and the target subscribed object and the attribute of the target subscribed object into the proxy subscription table. The COV proxy and subscription aggregation based on the router is realized.

The utility model provides a kind of heat dissipation device of general BACnet network controller, belong to network controller field, including controller, the positive side of the controller is provided with connecting port, the inside of the controller is provided with heat dissipation device;The heat dissipation device includes water tank, one end of water pipe is fixedly connected in the bottom of the water tank, the other end of the water pipe is fixedly connected in the positive side of water tank, the circumferential surface of the water pipe is fixedly penetrated in the inner wall of controller, the circumferential surface of the water pipe is provided with circulating water pump, the inner wall of the controller is fixedly connected with motor, the output shaft of the motor is fixedly connected with rotating shaft.The utility model is provided with heat dissipation device, so that rotating shaft can drive heat dissipation leaf to rotate when rotating, so that the wind power generated when heat dissipation leaf rotates can blow the cool air that water in water pipe dissipates to the below of controller, to avoid cool air in the above of controller.

Methods provide device authentication for an intrusion detection system implementing building automation and control network (BACnet) Master-Slave / Token-Passing (MS / TP). An authentication protocol provides countermeasures to vulnerabilities in the BACnet MS / TP physical layer by utilizing an extended message format to cloak device identifiers (IDs). Adversaries are prevented from using known device IDs to gain access to the network. An authenticating device hashes a device identifier of a device to be authenticated combined with a random number. The authenticating device receives a hash of the random number plus the device identifier from the device. The authenticating device compares the hashes and authenticates the device if the hashes match. To transmit the hash, the BACnet MS / TP frame format includes an extended header cyclic redundancy check (CRC) field having bytes reallocated from the data field of the frame format. Another countermeasure utilizes a physical unclonable function (PUF) of the device in the extended header CRC.

The application belongs to the technical field of industrial network, and particularly relates to a joint scheduling method based on BACnet / IP and TSN network, comprising the following steps: obtaining BAcnet / IP data frames, which are subjected to VLAN label adding processing at a data link layer, and the BAcnet / IP data frames are identified by traffic priority in the TSN network; dividing the BAcnet / IP data frames into periodic traffic and aperiodic traffic, periodically allocating periodic queues according to the traffic priority, adopting a periodic data scheduling method based on load adaptive priority, and scheduling in a periodic time period of each continuous cycle, and according to the traffic priority, allocating non-periodic queues to the aperiodic traffic, adopting a dynamic adjustment priority strategy, and scheduling in a non-periodic time period of each continuous cycle; the application realizes interconnection of two networks, preferentially guarantees periodic traffic transmission under the premise of not exceeding given resources, reduces the time delay of the BACnet / IP network, and ensures that critical tasks are completed on time.

This invention relates to the field of building automation and industrial IoT communication technology, and discloses a storm-free batch scheduling method for BACnet client subscription changes. The method includes: configuring a lifecycle and resubscription period for each subscription request; at the beginning of each resubscription period, iterating through and querying the device status table of all objects in the client configuration that need to initiate subscription requests and their respective devices, adding online devices and objects with enabled COV subscriptions to the device list for the next round of subscriptions; dividing the subscription requests in the device list into multiple consecutive batches and inputting them into an asynchronous sending queue batch by batch; and, combined with an anti-starvation time slice mechanism, retrieving requests from each priority queue in descending order of priority and sending them. This invention solves the network congestion problem caused by large-scale subscription storms and the problem of subscription state asynchrony caused by silent loss in permanent subscription mode.

The present invention relates to a remote AI monitoring and control unit designed for industrial automation. This unit integrates multiple communication protocols, advanced artificial intelligence (AI) capabilities, and enhanced security features to autonomously or semi-autonomously monitor and control industrial processes. The unit supports a wide range of communication protocols, including MQTT, USART, CAN bus, I2C, SPI, Modbus, Profibus, DeviceNet, EtherNet / IP, CANopen, PROFINET, BACnet, DNP3, and HART, ensuring seamless interoperability with various industrial devices. It features adaptive communication, predictive maintenance, anomaly detection, and edge AI processing. Enhanced security is achieved through blockchain integration, AI-based threat detection, and multi-layered encryption. The unit also incorporates energy-efficient operation with energy harvesting and AI-optimized power management. An augmented reality (AR) interface provides real-time data visualization and remote assistance. The modular and scalable design allows for easy customization and expansion, while a user-friendly software interface offers customizable dashboards and AI-driven insights.